Originally Posted by Claytonious
I have found that leaving gear out in the sun actually makes it smell less, not more. UV light kills whatever is causing the funk, just like those neat little pens that you can put in a Nalgene bottle to make it safe to drink. Leaving wet gear in a sealed drybag makes it stink like crazy however. And yes, the sun will degrade anything made from a polymer, like your kayak, and all synthetic clothes. I generally leave my gear to dry in the sun for an hour or two, which seems to get the funk out but not destroy stuff.
This and what Ture said are the only good pieces of advice on this entire thread and they're dead-on. Except I can't believe that Ture washes his shit every week - I'll wash mine every season whether it needs it or not! You need no other info.
Also - what the hell is mildly embarassing - as Ture said if your shit don't stink then you're just not paddling enough.